Download or read book Effects of Freeze thaw Cycles and Incorporated Residue on Rill Erosion written by P.A. Frame and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Measurement of Freeze thaw Compaction Residue and Slpe Effects on Rill Erosion written by P. A. Frame and published by . This book was released on 1992 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Mechanical Effects of Incorporated Residue on Rill Erosion written by Thomas George Franti and published by . This book was released on 1987 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Controlled Evaluation of Residue Compaction and Freeze thaw on Rill Erosion written by Paul Alexander Frame and published by . This book was released on 1989 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying the Effect of a Freezethaw Cycle on Soil Erosion written by and published by . This book was released on 2004 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper we quantitatively tested the hypothesis that soil freeze-thaw(FT) processes significantly increase the potential for upland hillslope erosion during runoff events that follow thaw. We selected a frost-susceptible silt to obtain an upper bound on FT effects, and completed three series of six experiments each to quantify differences in soil erodibility and rill development for bare soil following a single FT cycle. Each series represented a specific soil moisture range: 16-18%, 27-30%, and 37-40% by volume, with nominal flow rates of 0.4, 1.2, and 2.4 L/min and slopes of 8 and 15 . Each experiment used two identical soil bins, one a control (C) to remain unfrozen, the other to be frozen and thawed. Standard soil characterization tests did not detect significant differences between the FT and C bins. Experimental results were closely related to conditions of the experiment, imposing a requirement for minimum differences in soil weight, bulk density, and soil moisture through each series. We measured cross-sectional geometry of an imposed straight rectangular rill before each experiment, sediment load during, and rill cross sections after. Changes in cross section provided detailed measures of erosion at specific locations along the rill, while sediment load from time series runoff samples integrated the rill erosion. Several parameters, including average maximum rill width, average maximum rill depth, rill cross-section depth measures, and sediment load all followed similar trends. Each was greater in the FT than in the C, with values that generally increased with slope and flow. However, soil moisture was the only parameter that affected the FT/C relationship. For example, average sediment load grouped by soil moisture provided FT/C ratios of 2.4, 3.0, and 5.0 for low, mid, and high moisture, respectively. In contrast, a "dry" experiment at 4.4 soil moisture had FT/C of 1.02 for sediment load.
Download or read book Proceedings International Symposium Frozen Soil Impacts on Agricultural Range and Forest Lands written by and published by . This book was released on 1990 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the ASAE written by American Society of Agricultural Engineers and published by . This book was released on 1990 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Corn Residue and Slope on Rill Erosion and Depositon written by Lowell Gregory Brenneman and published by . This book was released on 1979 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meeting Program written by American Society of Agricultural Engineers. International Summer Meeting and published by . This book was released on 1989 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Overland Erosion Due to Freeze thaw Cycling written by Lawrence W. Gatto and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Engineering Index written by and published by . This book was released on 1987 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency of freeze thaw cycles bulk density and saturation effects on soil surface shear and aggregate stability in resisting water erosion written by S. N. Asare and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Erosion Estimation in Topographically Complex Landscapes written by Carlos Alberto Bonilla and published by . This book was released on 2006 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1992 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1992 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying the Effects of Freeze thaw Processes on Riverbank Erosion in the White Clay Creek Watershed Pa written by Zachary Cannon and published by . This book was released on 2019 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Subaerial erosion of riverbank sediments in the Mid-Atlantic region of the eastern United States is of particular concern with regard to sediment supply and water quality. One process heretofore understudied in this region that may play a role in erosion is the freezing and thawing of riverbank sediments, a process that occurs repeatedly as a consequence of the region's temperate winters. Over the last two years, observations of needle, segregated, and pore-space ice on riverbanks of the White Clay Creek suggest that the region's silty and sandy soils are prone to riverbank erosion and sediment entrainment related to soil freeze-thaw processes. Prior studies have acknowledged that soil freeze-thaw likely contributes to riverbank erosion but without direct quantification. To better understand the climatic conditions driving these processes and to attempt to quantify their effect on sediment erosion, an array of techniques were employed, including measurement of near-surface temperature and soil water content, erosion pins, and close-range digital photogrammetry surveying to monitor change over days to weeks for two vertical riverbanks. Through the winters of 2017 to 2019, periods of rapid freezing followed by significant thawing of water-saturated banks were repeatedly observed. The applied photogrammetry surveying techniques allowed for topographic models with sufficient resolution to quantify centimeter-scale retreat and expansion over the course of freeze-thaw events, fluxes which were validated by traditional erosion pin surveying measurements. These observations help to quantify the heretofore underestimated importance of soil freeze-thaw processes to an overall sediment budget. Additionally, the techniques presented herein lay the groundwork for further study to examine the contribution of freeze-thaw cycling to overall bank erosion rates for the White Clay Creek.
Download or read book Program of Annual Meeting and Papers Presented at Annual Meeting written by Minnesota Academy of Science (1932- ) and published by . This book was released on 1994 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
